No party, but if you are still picking dates, I might consider avoiding the weekend of Dec 2/3 (and perhaps the days before and after) which will be Candlelight Processional. This is different from WDW as it is performed just these two days in town square and is technically invite only (there are ways to do standby viewing but it can be a significant time investment- search for threads) so the stage and seating will block off much that area for the weekend and a couple days before which can make some traffic flow headaches. The performances themselves can also be a challenge with crowds but it is possible to just avoid things by staying in other areas of
Disneyland (or in DCA).
All that to say, it's not the end of the world if that weekend are the only dates that work for you but if you have other options its something to consider.